Journal of the Japanese Society of Snow and Ice
Online ISSN : 1883-6267
Print ISSN : 0373-1006
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Volume 52, Issue 1
Displaying 1-5 of 5 articles from this issue
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  • Distribution of snow cover in Honshu with due consideration of satellite imagery
    Ikuei MURAMATSU, Shigeru SATO, Tadashi UMEBAYASHI, Toru TAKEDA, Akira ...
    1990 Volume 52 Issue 1 Pages 1-11
    Published: March 30, 1990
    Released on J-STAGE: July 23, 2009
    DOIhttps://doi.org/10.5331/seppyo.52.1
    JOURNAL FREE ACCESS
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    Detailed distribution maps of mean annual maximum snow depth and mean last day of continuous snow cover were compiled for the snowy region of Honshu, Japan. In situ data from 2977 stations were used covering the years 1935 through 1955, as well as Landsat digital imagery. Twelve regions were defined on the map of mean annual maximum snow depth. For each region the relationship between elevation and snow depth was determined and the local characteristics are presented.
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  • On an improved equation for estimating the daily snowmelt water from snowpack
    Kunio AKATSO, Hiroki SUTO, Akira MASATSUKA
    1990 Volume 52 Issue 1 Pages 13-23
    Published: March 30, 1990
    Released on J-STAGE: July 23, 2009
    DOIhttps://doi.org/10.5331/seppyo.52.13
    JOURNAL FREE ACCESS
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    Snowmclt water is useful as a water resource, but in early spring it can sometimes be responsible for floods. Therefore, the estimation of snowmelt water yield from a drainage basin is an important subject in snowy districts. The rate of snowmelt has previously been estimated by the following equation as a function of daily mean air temperature tav in °C and daily total rainfall depth p in mm.
    Md=motau+ptavC/L
    where mo is a constant in mm/°C, L is the latent hear of fusion in cal/g, and C is the specific heat of ice. However, the rise times of hydrographs, estimated by using equation (1), tend to lag those of observed hydrographs at the beginning of runoff. To correct this problem, we adopt daily reference temperature instead of daily mean air temperature. The daily reference temperature Tplus, in °C is defined as follows :
    Tplus=tmax-θ (2)
    where tmax IS the daily maximum air temperature in °C and θ is on empirical constant. The improved equation for estimating the melting rate M'd in mm/day is expressed as follows :
    M 'd= Ms (tmax-θ) +P (tmax-θ) C/L (3)
    By using equation (3), the springtime runoff can be successfully simulated.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1990 Volume 52 Issue 1 Pages 25-28
    Published: March 30, 1990
    Released on J-STAGE: July 23, 2009
    DOIhttps://doi.org/10.5331/seppyo.52.25
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1990 Volume 52 Issue 1 Pages 29-34
    Published: March 30, 1990
    Released on J-STAGE: July 23, 2009
    DOIhttps://doi.org/10.5331/seppyo.52.29
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1990 Volume 52 Issue 1 Pages 35-40
    Published: March 30, 1990
    Released on J-STAGE: July 23, 2009
    DOIhttps://doi.org/10.5331/seppyo.52.35
    JOURNAL FREE ACCESS
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    [in Japanese]
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